highaltitude.log.20150218

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[01:43] <SpacenearUS> New vehicle on the map: 03KF5PGW-1 - 12http://tracker.habhub.org/#!qm=All&q=KF5PGW-1
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[03:53] <SpacenearUS> New position from 03KF5PGW-9 after 034 days silence - 12http://tracker.habhub.org/#!qm=All&q=KF5PGW-9
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[07:12] <SpacenearUS> New position from 03EDUPIC14 after 0310 hours silence - 12http://tracker.habhub.org/#!qm=All&q=EDUPIC14
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[07:45] <Zeusking19> Morning all
[07:47] <SpacenearUS> New position from 03ATSAT-4 after 037 hours silence - 12http://tracker.habhub.org/#!qm=All&q=ATSAT-4
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[08:02] <Vaizki> morning.. sorry to fade yesterday after throwing my first design on the channel, baby sleep interrupt (non maskable)
[08:03] <Vaizki> and Zeusking19, did edmoore give you a diploma yet? :)
[08:03] <edmoore> i sadly have no such power
[08:04] <Vaizki> I think your power is much greater than that...
[08:04] <Vaizki> anyway, to continue the screenshot flood of yesterday, here's what I cooked up based on everything I learned..
[08:04] <Vaizki> https://dl.dropboxusercontent.com/u/367935/vz-tracker-1-v0.png
[08:05] <Vaizki> it's been reiterated so many times I'm sure something is missing and yes I know there's only 3 mounting holes :)
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[08:05] <Vaizki> and matt said the resistor size is too small (1/8W)
[08:07] <garymortimer> morning have RTTY working using ntx2b from HAb supplies, mighty impressed with frequency stickers supplied BTW its the little things!
[08:07] <garymortimer> anyhow
[08:08] <garymortimer> GPS also working, is there simple code somewhere to just display the GPS data over RTTY all the things I have found so far are above my paygrade
[08:08] <SpeedEvil> :)
[08:08] <garymortimer> UNO and using an SDR to receive
[08:08] <SpeedEvil> you can simpley set the GPS baudrate to 50bps, configure it to have only the sentances you require, and just connect it directly
[08:09] <garymortimer> oh
[08:09] <daveake> No you can't (probably)
[08:09] <Vaizki> :O
[08:09] <daveake> UBlox won't go that low
[08:09] <garymortimer> thats what I thought and we are not worthy daveake
[08:09] <daveake> 1 Get GPS position, 2 sprintf lat/long/alt into a character array 3 Send through RTTY
[08:10] <daveake> #2 is easier than either of the others
[08:10] <daveake> So if you've done those you can do this
[08:11] <garymortimer> RTTY works, GPS works and I can see through serial its just the bit in the middle that's beyond me
[08:11] <daveake> no it isn't
[08:11] <Vaizki> you have interrupt-driven RTTY?
[08:11] <daveake> unlikely / unnneccessary
[08:11] <daveake> -n
[08:11] <pc1pcl> Vaizki: Would it make sense to rotate the NTX2B 90 degrees, so the antenna plug and HF out would line up directly?
[08:12] <Vaizki> hmm, I found it a lot easier than trying to keep together a main loop with tx timing
[08:12] <Vaizki> interrupt-driven transmission that it
[08:12] <Vaizki> pc1pcl: probably, last week when I started learning eagle it just kinda landed that way :)
[08:13] <garymortimer> @dave if that link was for me I am now V lost!
[08:14] <daveake> It was and if you don't get past that bit you're not going to finish
[08:14] <Vaizki> pc1pcl: not even sure if I will ever build that, this was a learning excercise
[08:14] <daveake> Strongly suggest doing a C primer then
[08:14] <Vaizki> to get to know eagle
[08:15] <Vaizki> and what might go on a tracker board in general
[08:15] <garymortimer> OIC I the less lazy than me route ;-)
[08:16] <garymortimer> I shall try harder! Thanks for all your most excellent work BTW.
[08:16] <pc1pcl> Vaizki: ok, still havent found the time to get to figuring out Eagle, so yesterday's conversation was helpful.
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[08:20] <Zeusking19> Hello everyone, got no time this morning so will talk to you later ;)
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[08:37] <jededu> daveake do you get your gas from BOC?
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[08:55] <daveake> jededu H2 yes
[08:56] <daveake> Helium though I notice that Air Products cylinders are available again (apparently that's been the case for a while, but I only just noticed)
[08:56] <daveake> and their cylinders are much lighter
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[09:42] <Vaizki> ok so I'm a bit confused with eagle, which resistor part is a "normal" through hole resistor then
[09:47] <mfa298> Is there such a think as a "normal" through hole resistor. Even through hole resistors can come in all shapes and sizes
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[09:47] <Vaizki> sure that's what I'm researching here a bit.. I think most of the resistors I have are 1/4 watt ones
[09:48] <Vaizki> but apparently I used sizing for 1/8 watt in my layout
[09:51] <Vaizki> and i don't really see myself needing 0.5W anywhere but I could be wrong. I'm running at 3.3V all the way (except the radio is fed directly by the battery) and there should be no significant current anywhere over a resistor
[09:51] <mfa298> 1/4 is going to be a little bit larger, probably around 8mm between the holes
[09:53] <mfa298> although that's only from working it out in my haed and having not really used eagle
[09:54] <Vaizki> ok maybe i need to find a part for that size just to be sure I don't have to mount the resistors vertically :)
[09:55] <Vaizki> apparently there is also 1/6 watt ones :P
[09:58] <mfa298> resistors are cheap, you might find it better /cheaper to use the eagle part you found and buy some resistors to match
[09:59] <cm13g09> morning mfa298
[10:00] <mfa298> morning cm13g09
[10:01] <Vaizki> well I just need the right dimensions.. maybe a EU_R0207/10 is a good footprint for a 1/4W resistor then.. :P
[10:01] <cm13g09> mfa298: See PM
[10:02] <Vaizki> sorry R-EU_0207/10
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[10:06] <Vaizki> well there goes my layout
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[10:38] <zeusking19_mobi> Hello again all
[10:40] <edmoore> hello
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[10:44] <zeusking19_mobi> Not at home at the moment, will be soon
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[10:48] <Vaizki> he's really keeping us up to date isn't he
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[11:06] <Zeusking19> Hello once again
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[11:49] <Vaizki> hello Zeusking19, did I read correctly that you want to launch in 2 weeks?
[11:49] <Vaizki> that sounded a bit... optimistic? :)
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[12:08] <fsphil> from scratch?
[12:09] <Vaizki> well.. yes
[12:09] <Vaizki> maybe I read that wrong
[12:11] <daveake> Don't recall seeing anything like that
[12:15] <Vaizki> went to the logs.. probably he just meant putting together a HAB plan & presentation for the school.
[12:18] <daveake> ok
[12:31] <SpacenearUS> New position from 03KF5PGW-1 after 036 hours silence - 12http://tracker.habhub.org/#!qm=All&q=KF5PGW-1
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[12:50] <Zeusking19> Vaizki, indeed, the latter (plan and presentation for school)
[12:51] <Zeusking19> Two weeks is probably a little too optimistic
[12:51] <Zeusking19> (probably = definitely at my skill level)
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[13:03] <Vaizki> well I think you can put together a very convincing presentation how a HAB flight would involve many areas of learning
[13:05] <Vaizki> you have electronics, radio, gps & mapping, weather, construction, physics, project management, off road driving, climbing trees, etc
[13:11] <Zeusking19> Quite honestly, HAB is something that ties in with a lot of school subjects
[13:12] <Zeusking19> Electronics, Geography, Physics, Math, Graphical Design, Product Fabrication
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[13:15] <pc1pcl> Zeusking19: another way of looking at it is that a lot of school subjects are relevant for the real world ;)
[13:16] <Zeusking19> That is also that case :P
[13:16] <Vaizki> yes, just as relevant as launching high altitude balloons is!
[13:17] <daveake> Every job I ever got was because I could talk at interview about whatever interesting techie project I was doing at the time
[13:17] <daveake> HAB is perfect for that
[13:17] <daveake> (by which I mean, outside-work project)
[13:17] <Vaizki> I have never gotten a job but sounds good to me :)
[13:18] <daveake> I'm unlikely to get one :)
[13:18] <daveake> now :)
[13:18] <UpuWork> Not like you need one
[13:18] <Zeusking19> HAB is one of those more uncommon hobbies if you compare it to what else is out there
[13:18] <UpuWork> When I interview the people who are actually interesting generally get the job
[13:18] <daveake> It is, but more importantly it does tie together several fields (sometimes literally)
[13:19] <craag> From what I've seen - Dave runs HAB Support Ltd.
[13:19] <daveake> seems like it sometimes :/
[13:19] <Vaizki> yes latex and rope is all you need for a good time
[13:19] <Vaizki> hmm did I say that out loud then..
[13:19] <Zeusking19> :P
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[13:19] <UpuWork> and recorded for ever
[13:19] <Vaizki> eep eep
[13:20] <edmoore> this is a family-friendly hobby channel Vaizki :)
[13:20] <UpuWork> http://habhub.org/zeusbot/
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[13:20] <Vaizki> edmoore, I have a family. I am friendly. job done!
[13:21] <SpacenearUS> New vehicle on the map: 03home_chase - 12http://tracker.habhub.org/#!qm=All&q=home_chase
[13:22] <Vaizki> and here's the latest iteration of my eagle wrangling, http://gyazo.com/59528c9edd179b75ad93f0509a247fea
[13:22] <Vaizki> I am starting to see why SMD would be a great idea
[13:22] <pc1pcl> I suppose to 'get' that remark, your mind needed to be spoiled already anyway ;)
[13:23] <UpuWork> just check the header for the ICSP plug will fit down the side of the ntx2b Vaizki
[13:23] <Vaizki> I kept adding stuff to the design and then realized my resistors were some tiny ones so it got revised 3-4 times and now it's a mess :)
[13:24] <Zeusking19> Given society's mindset these days anyway many people would get that anyway
[13:24] <Zeusking19> Random question that I know I will be asked: What are the main risks involved with HAB?
[13:24] <daveake> trees
[13:24] <Vaizki> UpuWork, will do
[13:24] <craag> dropping the gas cylinder on your toe
[13:25] <Zeusking19> ouch
[13:25] <adamgreig> dropping the gas cylinder
[13:25] <Vaizki> UpuWork, anything else stick out?
[13:25] <Zeusking19> Using Hydrogen is probably a risk :P
[13:26] <daveake> meh
[13:26] <Vaizki> depends, but probably not something you want to put in a school presentation
[13:26] <daveake> nope
[13:26] <Zeusking19> Not putting this in the presentation but seeing as it will be asked at some point knowing my school
[13:26] <Zeusking19> it'd be good to find out
[13:26] <daveake> I've had a long conversation with H&S at a certain corporation regarding use of H2 for a launch
[13:27] <daveake> Waste of time in the end
[13:27] <Vaizki> H&S?
[13:27] <Zeusking19> Health & Safety assuming
[13:27] <Vaizki> ah
[13:27] <daveake> yup
[13:28] <Zeusking19> If it means anything my school are the kind of school to get you to write out a full risk assessment yourself before passing it up
[13:28] <daveake> Or "Hydrogen And Sparks" as I call them
[13:28] <Vaizki> I don't think 99% pure hydrogen is a risk when used outdoors
[13:28] <daveake> Good practice for you Zeusking19
[13:28] <Vaizki> the contained hydrogen (in the balloon) is not going to go off
[13:28] <daveake> I know
[13:28] <daveake> You know
[13:28] <Vaizki> and any that leaks is going to disappear like that
[13:28] <daveake> They however do not
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[13:29] <Vaizki> well I don't know, I think.. and you are confirming it :)
[13:29] <Zeusking19> To be honest it would be best to spend a little bit more to avoid setting something on fire, no?
[13:29] <daveake> Thing is, right at the start I said "let's use helium as H&S are going to refuse in the end"
[13:29] <daveake> and many emails later, I'm right
[13:30] <daveake> H2 is cheaper and goes higher and isn't a limited resource
[13:30] <Vaizki> did you tell them you are using dihydrogen monoxide to wash your hands?
[13:30] <daveake> and used with a few simple precautions is not going to "do a hindenberg"
[13:31] <gonzo_> no 9yr olds allowed to smoke at the launch
[13:31] <sp5nvx> done doc 04725c7c8559446f47e75e270e6b945e approve please
[13:32] <adamgreig> please ask in #habhub
[13:33] <adamgreig> lz1dev: maybe the bot could listen for flight IDs in here too :p
[13:33] <Vaizki> daveake, I would like to imagine you quoted H&S there but that would be just too good to be true
[13:33] <lz1dev> adamgreig: probably not a good idea
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[13:46] <Ian_> agreed. The preferred mechanism is clear Compliance should not be made optional..
[13:46] <R34lB0rg> gonzo_, ultimate h2 safety advice :)
[13:46] <Ian_> Exploding hedgerows
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[14:01] <Vaizki> speaking of sparks, what'a a reasonable nichrome wire thickness for a cutdown?
[14:02] <Zeusking19> Guys, what would be things to put in this presentation that would be beneficial?
[14:02] <Vaizki> enthusiasm
[14:03] <Zeusking19> :P
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[14:05] <eroomde> whoops
[14:06] <Vaizki> I mean I can apply ohm's law to calculate how many amps a certain length of nichrome is going to draw but not sure how much I need to melt a nylon string
[14:08] <Ian_> If your nichrome glows, your nylon goes . . . it will of course act as a heatsink and needs to be thermally insulated to maximise the heating effect.
[14:09] <Vaizki> well I don't have any nichrome so I need to order some.. :)
[14:09] <daveake> Horrible stuff
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[14:09] <daveake> You'll need some screw terminals for it
[14:10] <Vaizki> yea I don't intend to solder it
[14:10] <daveake> A small low-value thru-hole resistor is an alternative
[14:10] <Vaizki> and I have screw terminals
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[14:12] <Vaizki> 0.3mm wire @ 14 ohm/m... 5 cm of wire = 0,7 ohm .. @ 5V that's 7 amps =~ 35W of.. sounds a lot
[14:13] <daveake> You're unlikely to get 7A out of a cold lithium energizer
[14:13] <Vaizki> quite so
[14:13] <daveake> I suggest you do some tests. For the length of wire I used, 4W was enough to melt the cord pretty quickly at room temp
[14:14] <daveake> Obviously your payload won't be at room temp
[14:14] <Vaizki> yes I'm just wondering what size of nichrome to get
[14:14] <eroomde> i have a number if you want it
[14:14] <eroomde> 100kW/m^2
[14:14] <eroomde> is a good number for melting through nylon
[14:15] <eroomde> (i have a product for aerospace applications that actually relies on melting through stuff so i have to have a properly calculated number)
[14:15] <Vaizki> well it's a nice round number too. easy to remember.
[14:15] <eroomde> yes
[14:15] <eroomde> exactly
[14:15] <eroomde> 10^5
[14:16] <eroomde> number of seconds in a day too
[14:16] <eroomde> (very roughly)
[14:17] <Vaizki> well practical considerations are leaning me towards 0.3mm wire, I guess I can just limit the current as needed
[14:18] <Ian_> What you do is take your wire and begin shortening the distance between contact points until you get the desired result and make sure that you have a confidence of certainty factor built in.
[14:20] <Vaizki> yes, I just need to be in the ballpark to play
[14:20] <Ian_> A 12V battery charger will quickly make a foot length of .3mm stainless steel (framing wire) glow at around 4A - not that that information is of much use
[14:21] <Vaizki> well it was fun as a kid to cut polystyrene with one of those
[14:22] <Vaizki> but ok I will get some 0.3mm and go from there
[14:23] <eroomde> 100kW/m^2
[14:23] <eroomde> trust
[14:23] <eroomde> (i mean, test it of course, don't blind trust)
[14:23] <Vaizki> I don't trust myself to calculate the effective contact area of a wire wound in a spiral around nylon rope
[14:25] <eroomde> you don't have to
[14:25] <eroomde> it's per unit area
[14:25] <Vaizki> oh wait don't those vaping guys use a resistor wire to vaporize their poisons
[14:25] <eroomde> so you don't need to calculate a contact area
[14:25] <eroomde> if you just have 10cm of wire, it's a cylinder of circumference x and height 10cm
[14:25] <eroomde> that gets you your area
[14:25] <Vaizki> I can leech some off a coworker probably
[14:26] <Vaizki> hmm
[14:26] <eroomde> and you calculate power dissipation in it vs feed voltage until you get to to 100kw?m^2
[14:28] <Vaizki> oh ok so you're talking about power dissipation in the wire, not how much the nylon rope needs per m2
[14:29] <Laurenceb> just use a 10ohm resistor
[14:31] <eroomde> Vaizki, the heat flux through the surface of the wire, yes
[14:32] <Vaizki> will try that too.. I thought of a mechanical release using mini servo or solenoid also but it's probably been tried and failed already
[14:32] <Laurenceb> http://ukhas.org.uk/_media/projects:dscn1015.jpg?cache=cache
[14:33] <eroomde> i like explosives
[14:33] <eroomde> i always just use explosives
[14:33] <eroomde> they work
[14:34] <Vaizki> yes I considered a blasting cap but restrictions...
[14:34] <adamgreig> explosives++
[14:34] <Vaizki> Laurenceb, 10 ohm resistor inside the foil?
[14:34] <Laurenceb> yes
[14:34] <Laurenceb> but no foil lol
[14:35] <Vaizki> yea I was wondering...
[14:35] <Laurenceb> 10ohm, 0.125W with 6v applied
[14:35] <Laurenceb> then PP line, not nylon
[14:35] <Laurenceb> nylon has high melting point
[14:38] <Vaizki> I am not even sure if a cutdown is needed. Main reason for considering it is that this country is >70% forest.
[14:40] <Vaizki> compared to 10% or so for the UK..
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[14:52] <gonzo_> would be interesting if the payload could detect landing (alt stops changing) then do a cutdown after a delay
[14:52] <gonzo_> to detatch the payload from the line/chute
[14:52] <gonzo_> may make tree recovery easier
[14:53] <gonzo_> possibly even find it on the floor, or just a case of playing long range snooker to poke it out from the branches
[14:54] <daveake> That's wouldn't have been good for jcoxon's "hanging from branch above river" one
[14:55] <daveake> fizz ... splash
[14:57] <gonzo_> yep, though it would have made an interesing track on the mapping!
[14:58] <Vaizki> not likely to receive anything from a payload in a river until you're very close?
[14:58] <daveake> Shame I wasn't uploading the golf course one
[14:58] <daveake> that would have been good
[14:59] <gonzo_> would not want too much of a delay before cutdown. Or it may give passers by enough time to stand under to look up and point
[14:59] <gonzo_> and....
[14:59] <gonzo_> need a leo style historical dump
[15:00] <eroomde> anyone got that jcoxon photo to hand?
[15:00] <eroomde> it's great
[15:03] <UpuWork> I don't have that one
[15:04] <UpuWork> I have 2 of Darkside, this one of daveake https://dl.dropboxusercontent.com/u/63720513/Images/Funny/daveake.png
[15:04] <daveake> http://www.youtube.com/watch?v=B-o9fDeFYkE
[15:04] <UpuWork> Sleepy arko https://dl.dropboxusercontent.com/u/63720513/Images/Funny/IMG_2046.JPG
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[15:04] <daveake> http://www.pd3em.com/files/images/DSC00102.jpg <-- gottit
[15:05] <daveake> took some finding
[15:05] <UpuWork> oh that one
[15:05] <lz1dev> close call
[15:07] <Vaizki> what's the red thing?
[15:08] <eroomde> tangled chute
[15:09] <Vaizki> oh ok. very tangled.
[15:12] <eroomde> chutes being inline was not obvious back-in-the-day
[15:13] <HB9RSU> Hi guys ... just catching up what has been written...
[15:14] <HB9RSU> I am also designing a cutting (or better a seperation) device at the moment.
[15:14] <HB9RSU> I want to use a micro RC-servo wthich releases the balloon
[15:15] <daveake> Steve (rocketboy) did that to drop the Action Man toy on that James May show
[15:15] <mattbrejza> i thought he knocked the payload on the ground to relase the toy?
[15:15] <daveake> lol
[15:16] <Vaizki> my mechanical separation idea was something akin to a shackle where the pin is pulled by a servo and the pin is holding an o-ring with silicon grease on it :)
[15:16] <Vaizki> with the cord tied to the o-ring
[15:16] <eroomde> some servo gearboxes uses a grease which isn't very greasy at -40
[15:17] <eroomde> just be aware of that
[15:17] <Vaizki> or solenoid
[15:17] <HB9RSU> I just turn a axis which is milled away a bit which releses a counter part
[15:17] <eroomde> Vaizki, i used a pyrotechnic protractor that that
[15:17] <eroomde> infact there have been very many cusf things that have used pyrotechnic protractors to push things out of loops such that they can be free
[15:17] <Vaizki> I thought this was a family safe channel!
[15:18] <HB9RSU> it doesn't need much power and can triggered directly by the raspberry
[15:18] <eroomde> pyrotechnic protractors are fun for the whole family
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[15:18] <adamgreig> love pyrotechnic protractors
[15:18] <HB9RSU> my fits choice was pyro too :-) but we maybe fill the balloon with H2 and that combination makes me nervous
[15:19] <HB9RSU> first
[15:19] <Vaizki> well it's similar to my blasting cap idea :)
[15:19] <eroomde> it shouldn't
[15:19] <eroomde> it will be fine
[15:19] <Vaizki> how much do those cost..?
[15:19] <eroomde> depends on qty
[15:20] <adamgreig> here's one in a vice
[15:20] <eroomde> £45 in individual units last time i bought sdome
[15:20] <adamgreig> "protracting" an M3 nut
[15:20] <adamgreig> https://www.dropbox.com/sc/541v9poj3oausm3/AAB4x01CpEVoAshSiW3UPCx-a
[15:20] <HB9RSU> e-matches are easy to get, blast caps not so...
[15:20] <eroomde> £25/ea in `>50
[15:20] <adamgreig> before/after https://www.dropbox.com/sc/2icsgwjnbk41zi6/AACHt6FtSJeG3uH7tPq-zYaaa
[15:21] <daveake> https://www.youtube.com/watch?v=3YrItFNQ_vw
[15:21] <adamgreig> sexy/10
[15:21] <Vaizki> I have the same vice so I must be on the right track
[15:21] <eroomde> they are the right answer to high reliability provision of a lot of force very quickly
[15:22] <adamgreig> hey eroomde maybe you'll know the answer to a mystery I have with them
[15:22] <eroomde> maybe
[15:22] <adamgreig> all else the same, DC doesn't fire them at all, and a 10ms pulse does
[15:22] <eroomde> wat
[15:22] <adamgreig> which leads me to believe my guess about what's inside the magic brass bolt is not quite accurate
[15:22] <eroomde> never observed that
[15:23] <adamgreig> so it's weird, right
[15:23] <adamgreig> but the datasheet implies this too actually
[15:23] <eroomde> totally never had a problem firing them just applying a current
[15:23] <eroomde> honestly
[15:23] <adamgreig> it makes it very clear the all-fire current for 10ms pulses is about ten times less than the DC current
[15:23] <adamgreig> which I assumed was me misinterpreting it
[15:23] <adamgreig> until I tried to fire some with DC from m2fc and they wouldn't pop
[15:23] <adamgreig> nada
[15:23] <adamgreig> swap to a 10ms pulse instead, bam every time
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[15:24] <adamgreig> blew the top of the rocket a clean metre into the sky, shearing three nylon bolts in the process
[15:24] <adamgreig> (should have videoed it!)
[15:24] <adamgreig> so yea, I was a bit baffled
[15:25] <eroomde> what current in each case?
[15:26] <eroomde> i've never pulsed them with any of my firing circuits
[15:26] <eroomde> i mean, apart from like 1s to just turn it off as a matter of routine
[15:26] <adamgreig> didn't have an ammeter in series but ~7V from a 4-pack of lithium primary cells through a 5R resistor and a reasonably good MOSFET
[15:26] <eroomde> that's really weird
[15:26] <eroomde> i honeslty haven't observed this
[15:26] <eroomde> and i really have blown several tens of them through my own electronics
[15:26] <eroomde> i am now baffulated
[15:26] <adamgreig> on the bench supply I set it to some volts and didn't use a ballast resistor and it was also popping time
[15:27] <eroomde> also we've definitely definitely bench-tested them just with a psu
[15:27] <adamgreig> so yea, it's on my list of quirky desert phenomenon to investigate later
[15:27] <eroomde> yes
[15:27] <eroomde> very odd
[15:27] <adamgreig> like, why did my mtx2 not modulate the radio barely at all
[15:27] <adamgreig> and other queries that come up when you're in the middle of a desert at 3am
[15:27] <eroomde> you get all the fun
[15:27] <adamgreig> we thought the whole thing was a writeoff tbh
[15:28] <adamgreig> jack and i, 2am, cold, desert, attempt to fire the nosecone pyros to separate
[15:28] <adamgreig> nothing happens
[15:28] <eroomde> maybe you upset a god
[15:28] <adamgreig> cannot get m2fc to fire a protractor
[15:28] <adamgreig> that could have been it
[15:28] <adamgreig> jack was ready to call it
[15:28] <adamgreig> i recalled the datasheet's 10ms pulse weirdness, and everything worked again
[15:28] <adamgreig> shrug
[15:29] <adamgreig> not got many metrons left in the lab as we left a small bag in the states so will carefully see what I can figure out
[15:29] <eroomde> we have a few
[15:29] <adamgreig> I want to try their high energy ones one day
[15:29] <adamgreig> same deal, same case size even I think, just Scarier
[15:30] <adamgreig> CE are ok to supply them in small qty (at exorbitant cost) to us?
[15:31] <Geoff-G8DHE-M> http://www.chemringenergetics.co.uk/~/media/Files/C/Chemring-Energetics-V2/documents/ceuk-metron-actuators-4pp.pdf
[15:31] <Geoff-G8DHE-M> Clearly states 10mS pulse is quicker faster!
[15:31] <adamgreig> those are the good stuff (the image on the first page of the exploding earth is about what you get when you put 1A into them)
[15:31] <adamgreig> but the Type 3 is 100x the energy of the Type 1, which sounds fun
[15:32] <eroomde> nice
[15:32] <eroomde> yeah CE was easy
[15:32] <eroomde> i just called them up
[15:32] <adamgreig> and needs a fraction of the current - 50mA
[15:32] <eroomde> then did her a bank transfer
[15:32] <eroomde> sheila i think it was
[15:32] <eroomde> we bought 50
[15:32] <adamgreig> I remember doing a "bank transfer" to them for the m2 box of 50
[15:32] <eroomde> but they'll sell you them in much smaller qtys
[15:32] <adamgreig> bwim I literally transferred a few thousand pounds in £50s from one bank on the high street to another
[15:32] <eroomde> student society accounts
[15:32] <eroomde> the best kind of accounts
[15:33] <jededu> Thx daveake ordered some
[15:34] <fxmulder> anyone have any code using one of the si4xxx transmitters with aprs?
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[15:47] Nick change: jdiez_ -> jdiez
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[15:50] <eroomde> adamgreig, so
[15:50] <eroomde> http://www.monetti.net/pdf/en/PRODUCTS_ACTUATORS_GAS_GENERATORS/01/DR%202006%20C2%20EN.pdf
[15:50] <eroomde> dc 0.6A
[15:50] <eroomde> 10ms pulse 0.9A
[15:50] <eroomde> recommended single firing current 1A
[15:51] <eroomde> 10mA continuity check max
[15:51] <eroomde> pretty sure i've never had a problem just giving them an amp for a second
[15:51] <eroomde> that's how sshadt and martlet1 worked
[15:51] <adamgreig> so that was my target - 7V battery pack, 5R resistor, ~1R metron, <1R MOSFET
[15:51] <adamgreig> adds up to 7V, <7R, >1A
[15:52] <adamgreig> (with the inequalities 'close')
[15:52] <eroomde> that's very odd then
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[15:52] <adamgreig> yep
[15:56] <Zeusking19> eroomde, is that just edmoore with a different username?
[15:57] <eroomde> yes
[15:57] <eroomde> edmoore[::-1]
[15:58] <eroomde> "edmoore"[::-1] i suppose
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[16:04] <SpacenearUS> New position from 03EDUPIC14 after 038 hours silence - 12http://tracker.habhub.org/#!qm=All&q=EDUPIC14
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[16:10] <Laurenceb> im guessing its a thermal diffusion issue
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[16:31] <Oddstr13> Python <3
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[16:50] <Flerb> I was thinking, could you use a programmable oscillator as the crystal for an arduino?
[16:50] <Flerb> And then you could change the clock frequency depending on what you are doing
[16:50] <adamgreig> yes (but you need to change the fuse settings to expect an external clock rather than an external crystal)
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[16:50] <adamgreig> but.. you probably should not do that
[16:52] <Flerb> rightt
[16:52] <Flerb> i might ask in #arduino see what people say
[16:52] <adamgreig> what do you hope to achieve from doing it?
[16:53] <Flerb> Well, isn't there less current consumption at lower clock speeds? Then again I suppose things take longer
[16:53] <daveake> sleep
[16:53] <adamgreig> much better to just put the arduino to sleep yes
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[17:05] <Flerb> How would I start looking at how to integrate the ATmega328p in my circuit
[17:05] <Flerb> Well
[17:05] <Flerb> PCB
[17:09] <SpacenearUS> New vehicle on the map: 03SP5NVX - 12http://tracker.habhub.org/#!qm=All&q=SP5NVX
[17:09] <Flerb> i guess i'll look at the arduino uno schematic
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[17:13] <Vaizki> Google breadboard arduino
[17:13] <Vaizki> You need regulated power, a crystal and 2 caps
[17:14] <adamgreig> you don't strictly need the crystal and caps either
[17:14] <adamgreig> or regulated power so long as it's within the acceptable input range
[17:19] <Flerb> the uno's schematic looks hella complex doe
[17:20] <arko> ...
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[17:21] <Flerb> ...
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[17:25] <KC9SGV> How do I add my station description to my tracking station position..... RADIO AND ANTENNA...?
[17:31] <Reb-SM0ULC> in fldigi?
[17:34] <KC9SGV> No...WSJT-X....scanning 10.138 MHz in Chicago.
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[17:41] <Reb-SM0ULC> jsut enter locator etc in setup
[17:41] <Geoff-G8DHE> KC9SGV, Try Configure|Operator, but also make sure you goto DL Client and put the Lat Long,Alt in there asw ell!
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[17:55] <KC9SGV> How do add my listening station particulars....antenna and radio...? Using WSJT-X
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[18:03] <KC9SGV> What tracking station software is used generally...?
[18:03] <Upu> you need to use dl-fldigi
[18:04] <Upu> http://ukhas.org.uk/guides:tracking_guide
[18:04] <KC9SGV> Ok...does it have WSJT-X as a mode....?
[18:05] <Upu> not that I'm aware of
[18:05] <Upu> afk
[18:07] <KC9SGV> Because WSJT-x also reports to HABHUB. WSJT-X is one of the WSPR modes specifically for HAB operations.
[18:08] <Geoff-G8DHE-M> Are you sure ? I thought the PS30-33 flights were the first to use WSPR and that used his own software for the decoding ?
[18:10] <KC9SGV> I am a newbie , so I might be wrong...Looking for a good popular HF mode, other than APRS
[18:10] <Flerb> ooh
[18:10] <Flerb> you can do electronic and electrical engineering at soton
[18:10] <Flerb> with 2 years in malaysia
[18:10] <Geoff-G8DHE-M> What are you trying to do then track HAB's or something else ?
[18:11] <Vaizki> PS flights had WSPR and JT9 i think
[18:11] <KC9SGV> Just HABs...Later fly my own one
[18:11] <Vaizki> Wsjt-x decodes jt9
[18:11] <KC9SGV> Just HABs...Later fly my own one.
[18:12] <Geoff-G8DHE-M> Well most HAB's use VHF/UHF trailing lomg aerial wires can be a problem and a danger!
[18:12] <Flerb> oh wait its for malaysians
[18:12] <Vaizki> WSPR is caught by global stations automatically
[18:12] <Vaizki> But you only get maidenhead locator
[18:13] <Geoff-G8DHE-M> Yes but its so slow dd you see how many spots there were for the PS flights!
[18:13] <KC9SGV> Maybe, but thin transformer wire will vaporize if hitting HT wires...
[18:13] <Geoff-G8DHE-M> But the plasma then leads to arcing and wild fires :-(
[18:14] <R34lB0rg> I also want to use JT9 (WSPR) or Olivia for my HAB
[18:15] <KC9SGV> WSjT-X has both JT-9 and JT-65
[18:16] <KC9SGV> Only one tracking station in the U.S. Today...me
[18:17] <KC9SGV> What antenna did Andy VK3YT use...?
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[18:20] <KC9SGV> Less chance of my balloon hitting HT wires and starting a single wild fire, than millions of lightning strikes doing it every day. It is numbers game...
[18:21] <R34lB0rg> KC9SGV, I will however use 433MHz
[18:21] <R34lB0rg> so only a short antenna
[18:22] <KC9SGV> Understood, but out to sea..?
[18:22] <Vaizki> Or in orbit
[18:23] <Ian_> So, Olivia it is :)
[18:25] <KC9SGV> Yep, seems Andy is still looking for the perfect mode for the pico flights.
[18:26] <Vaizki> I don't think Andy made his pico hf antenna public
[18:26] <SpeedEvil> http://www.pbs.org/newshour/rundown/boston-mayor-stop-foolish-act-jumping-windows-snow/
[18:26] <Vaizki> Probably some kind of loop
[18:26] <SpeedEvil> Sort-of-high-altitude
[18:26] <KC9SGV> What payload does he use...? Where do I get that..?
[18:26] <Vaizki> He makes them himself
[18:28] <KC9SGV> Interesting, can't find any documentation about the payload. A
[18:28] <KC9SGV> So not his email address....
[18:30] <KC9SGV> Anybody has his email address...?
[18:31] <KC9SGV> Nothing in QRZ.com
[18:35] <KC9SGV> Nothing anywhere on the Internet...strange..How does he communicate to the guys who advertises his flights..
[18:38] <KC9SGV> Andy, VK3YT, please email me...I am good in QRZ.com
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[18:38] <Vaizki> I'm sure the lack of details is not an accident...
[18:39] <KC9SGV> I will gladly buy a payload at market value...
[18:42] <Laurenceb> http://www.emcesd.com/tt2004/tt090104.htm
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[18:47] <jededu> EDUPIC Solar version http://imgur.com/tRS1uT0
[18:47] <Geoff-G8DHE-M> Looks neat!
[18:48] <Geoff-G8DHE-M> Perhaps KC9 would like to buy it ;-)
[18:48] <jededu> Never :)
[18:49] <Geoff-G8DHE-M> Quite, not sure he appreciates the ethos of this channel ;-)
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[18:50] <Laurenceb> whats on the other side?
[18:50] <KC9SGV> VK3YT, please email me. I am good in QRZ.com
[18:51] <Upu> he's not here
[18:51] <Upu> -> picospace.net
[18:52] <KC9SGV> Thanks. Will look there again
[18:53] <jededu> Laurenceb stepdown and mtx2
[18:53] <Laurenceb> ah
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[19:06] <Ian_> so , , , KC free . . .
[19:07] <Ian_> It was like a poodle pestering someones leg
[19:19] <Reb-SM0ULC> about hf.. any balloons doing 2.4 ghz?
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[20:54] <jededu> Just figuring out why power saving wasnt working on the uBlox M8, the protocol has changed had to mod the code
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[21:03] <Upu> only works in GPS GNSS
[21:04] <jededu> It was working with the last flight :)
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[22:12] <jededu> ping upu
[22:17] <Upu> pong jededu
[22:19] <jededu> When I enable only GPS in GNSS no GPGGA is that correct?
[22:19] <jededu> So look for GNGGA?
[22:19] <Upu> err I think it reverts to GPGGA rather than GNGGA
[22:19] <Upu> I can't remember tbh
[22:19] <Upu> just search for G?GGA
[22:20] <jededu> Ok I think thats what it is thx
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[23:05] <SpacenearUS> New position from 03KF5PGW-9 after 039 hours silence - 12http://tracker.habhub.org/#!qm=All&q=KF5PGW-9
[23:07] <lz1dev> !aprs ping k6rpt*
[23:07] <SpacenearUS> 03lz1dev: Latest contact: 03K6RPT-12 10(7 days ago), 03K6RPT-11 10(5 days ago), 03K6RPT 10(an hour ago)
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[23:09] <lz1dev> !ping atsat-2
[23:09] <SpacenearUS> 03lz1dev: Last contact with 03ATSAT-2 was 0315 days ago
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[00:00] --- Thu Feb 19 2015